/**
* Produces RDF dump of the entity
*
* @param EntityId $entityId
*
* @throws EntityLookupException
* @throws StorageException
* @return string|null RDF
*/
protected function generateDumpForEntityId(EntityId $entityId)
{
try {
$entityRevision = $this->entityRevisionLookup->getEntityRevision($entityId);
if (!$entityRevision) {
throw new EntityLookupException($entityId, 'Entity not found: ' . $entityId->getSerialization());
}
$this->rdfBuilder->addEntityRevisionInfo($entityRevision->getEntity()->getId(), $entityRevision->getRevisionId(), $entityRevision->getTimestamp());
$this->rdfBuilder->addEntity($entityRevision->getEntity());
} catch (MWContentSerializationException $ex) {
throw new StorageException('Deserialization error for ' . $entityId->getSerialization());
} catch (RevisionedUnresolvedRedirectException $e) {
if ($e->getRevisionId() > 0) {
$this->rdfBuilder->addEntityRevisionInfo($entityId, $e->getRevisionId(), $e->getRevisionTimestamp());
}
$this->rdfBuilder->addEntityRedirect($entityId, $e->getRedirectTargetId());
}
$rdf = $this->rdfBuilder->getRDF();
return $rdf;
}
/**
* @param EntityRevision $entityRevision
* @param RedirectRevision|null $followedRedirect a redirect leading to the entity for use in the output
* @param EntityId[] $incomingRedirects Incoming redirects to include in the output
* @param RdfBuilder $rdfBuilder
* @param string|null $flavor The type of the output provided by serializer
*
* @return string RDF
*/
private function rdfSerialize(EntityRevision $entityRevision, RedirectRevision $followedRedirect = null, array $incomingRedirects, RdfBuilder $rdfBuilder, $flavor = null)
{
$rdfBuilder->startDocument();
$redir = null;
if ($followedRedirect) {
$redir = $followedRedirect->getRedirect();
$rdfBuilder->addEntityRedirect($redir->getEntityId(), $redir->getTargetId());
if ($followedRedirect->getRevisionId() > 0) {
$rdfBuilder->addEntityRevisionInfo($redir->getEntityId(), $followedRedirect->getRevisionId(), $followedRedirect->getTimestamp());
}
}
if ($followedRedirect && $flavor === 'dump') {
// For redirects, don't output the target entity data if the "dump" flavor is requested.
// @todo: In this case, avoid loading the Entity all together.
// However we want to output the revisions for redirects
} else {
$rdfBuilder->addEntityRevisionInfo($entityRevision->getEntity()->getId(), $entityRevision->getRevisionId(), $entityRevision->getTimestamp());
$rdfBuilder->addEntity($entityRevision->getEntity());
$rdfBuilder->resolveMentionedEntities($this->entityLookup);
}
if ($flavor !== 'dump') {
// For $flavor === 'dump' we don't need to output incoming redirects.
$targetId = $entityRevision->getEntity()->getId();
$this->addIncomingRedirects($targetId, $redir, $incomingRedirects, $rdfBuilder);
}
$rdfBuilder->finishDocument();
return $rdfBuilder->getRDF();
}